keyframe object in and then out of scene
Object visibility can be animated (keyframes):



Two visibilities: one for viewport and one for rendering. You may need to keyframe twice.

To add a keyframe, place the timeline where you want then change the visibility checking or unchecking the visibility, then:


Either place the mouse cursor on the check box and use I
Or use RMB on the check box and choose 'insert keyframe'




So you can blink an object: